diff options
| author | Craig Janeczek <jancraig@amazon.com> | 2018-10-19 17:49:19 +0200 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2018-10-29 14:13:53 +0100 |
| commit | 11d56f61036091206f085e58cff72b6872911d3a (patch) | |
| tree | 0bce6eb854cb74d009a42abba49d4be9df147acd /target/mips/translate.c | |
| parent | 53f1131fde02ae49e1f794f811a60fda32c72dca (diff) | |
target/mips: Add emulation of non-MXU MULL within MXU decoding engine
Add emulation of non-MXU MULL within MXU decoding engine.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Craig Janeczek <jancraig@amazon.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Diffstat (limited to 'target/mips/translate.c')
| -rw-r--r-- | target/mips/translate.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c index ccabd13c94..bdd46ed49c 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -1648,7 +1648,7 @@ enum { enum { OPC_MXU_S32MADD = 0x00, OPC_MXU_S32MADDU = 0x01, - /* not assigned 0x02 */ + OPC__MXU_MUL = 0x02, OPC_MXU__POOL00 = 0x03, OPC_MXU_S32MSUB = 0x04, OPC_MXU_S32MSUBU = 0x05, @@ -24909,6 +24909,11 @@ static void decode_opc_mxu__pool20(CPUMIPSState *env, DisasContext *ctx) */ static void decode_opc_mxu(CPUMIPSState *env, DisasContext *ctx) { + /* + * TODO: Investigate necessity of including handling of + * CLZ, CLO, SDBB in this function, as they belong to + * SPECIAL2 opcode space for regular pre-R6 MIPS ISAs. + */ uint32_t opcode = extract32(ctx->opcode, 0, 6); switch (opcode) { @@ -24922,6 +24927,18 @@ static void decode_opc_mxu(CPUMIPSState *env, DisasContext *ctx) MIPS_INVAL("OPC_MXU_S32MADDU"); generate_exception_end(ctx, EXCP_RI); break; + case OPC__MXU_MUL: /* 0x2 - unused in MXU specs */ + { + uint32_t rs, rt, rd, op1; + + rs = extract32(ctx->opcode, 21, 5); + rt = extract32(ctx->opcode, 16, 5); + rd = extract32(ctx->opcode, 11, 5); + op1 = MASK_SPECIAL2(ctx->opcode); + + gen_arith(ctx, op1, rd, rs, rt); + } + break; case OPC_MXU__POOL00: decode_opc_mxu__pool00(env, ctx); break; |